Seiko Cal. 6685 - 231

The Seiko 6685-231 represents an important milestone in Seiko's 1968 lineup. It features a Navy dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-6adec7aa0ef8]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

8.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1968

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